Int. J. of Oil, Gas and Coal Technology   »   2016 Vol.12, No.2

 

 

Title: Discussing the internal structural characteristics of coal seams using electrical microresistivity image logging data

 

Authors: Zhidi Liu; Jingzhou Zhao

 

Addresses:
School of Earth Sciences and Engineering, Xi'an Shiyou University, East Section of Electronic 2nd Road 18#, Xi'an, Shaanxi 710065, China
School of Earth Sciences and Engineering, Xi'an Shiyou University, East Section of Electronic 2nd Road 18#, Xi'an, Shaanxi 710065, China

 

Abstract: This paper summarises the response characteristics of electrical microresistivity image logging on different coal seam structures through systemic pectination from Qinshui Basin in Central China. We use these characteristics to describe the internal structure characteristics of coal seams. The results show that image logging is a good way to provide reliable information for many aspects, such as the division of coal seams, deformed soft coal, the internal structure of coal seams, and so on. Coal seams with a layered structure are commonly shown to be relatively homogeneous orange-yellow (2,700-3,900 ω·m) and to have clear lamination characteristics of dark and tan strips (800-1,500 ω·m) inside. The layered-block structure is mainly shown in bright yellow (3,300-3,600 ω·m) and has few dark stripes (800-1,200 ω·m). The block structure is shown as bright yellow-white (3,300-4,800 ω·m). The partings show up as clear and complete dark stripes (800-1,200 ω·m) in images. The layers in which deformed soft coal develops normally have irregular fractures and present dark stripes of dark grey strata (1,000-1,500 ω·m) in image logs [Received: June 17, 2014; Accepted: April 7, 2015].

 

Keywords: coal seams; internal structure; image logging; electrical microresistivity; China; coal seam division; soft coal deformation.

 

DOI: 10.1504/IJOGCT.2016.076540

 

Int. J. of Oil, Gas and Coal Technology, 2016 Vol.12, No.2, pp.179 - 196

 

Available online: 12 May 2016

 

 

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